Cysts and Oocysts (IMAGE) Spanish Foundation for Science and Technology Caption These are cysts and oocysts as seen by fluorescence microscopy. Credit Laboratorio de Parasitología (INGACAL-Xunta de Galicia) Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.